Warp tension mechanism for looms.



Patented Oct. 29, l90l.

V. E. MORSE.

WARP TEN'SEON MECHANISM FOR LOOMS.

Application filed mine 27, 1900.

(No Model.)

0., wwwwcmn n c UNITED STATES PATENT OFFICE.

VIRGIL E. MORSE, OF WORCESTER, MASSACHUSETTS, ASSIGN OR TO CROMP- TON & KNOWLES LOOM .WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. i g

WARP TENSION MECHANISM FORLOOMS.

SPECIFICATION forming part of Letters Patent N 0. 685,521, dated October 29,1901.

Application filed June 27, 1900. Serial 110.21,?29- (No model.)

To all whom it may concern:

Be it known that LVlRGIL E. MORSE, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Warp Tension Mechanism for Looms, of which the following is a specification.

My invention relates to looms, and particure larly to a warp-tension mechanism for looms in which two shuttles are used which are thrown simultaneouslyin the same direction or in opposite directions through the two sheds. In this class of looms two sheds must I 5 be formed-one for each shnttle at every pick of the loom.

In the operation of the loom one harness carrying one set of warp-threads is raised.

above the plane of the fabric being woven,

and another harness carrying another set of warp-threads is lowered below the plane of the fabric, while the other two harnesses carrying the other sets of warp-threads are in the plane of the fabric being woven, thus forming two sheds having two adjacent sides approximatelyin a common plane. The warpthreads are all of the'same length between.

the warp-let-off beam and the fell of the fabric but the distance between the let-off beam and the fell of the fabric is less for the warpthreads which extend in the same plane as the fabric than for the warp-threads which extend above and below the plane of the fabric. Therefore in the beating up of the reed 3 5 there will be slack in the warp-threads which extend in the plane of the fabric. The object of my invention is to overcome this slack in the warp-threads whichextend in the plane of the fabric and to provide an improved tension mechanism which will put a uniform tension on all the warp-threads without regard to whether they extend in the plane of the fabric or above or below this plane.

I have shown in the drawings simple forms 4 5 of tension mechanism embodying my improvements, which consist of two rolls intermediate the warp-let-off beam and the ordinary leaserods placed over the warp'beam and extending transversely across the loom-frame at the back of theloom and mounted at each end in rocking arms or bearings to have a simultaneous motion. In this position the two rolls act to counterbalance each other, so that the taking up of the slack is accomplished with very little strain and the necessity of auxiliary rolls for the Warp-threads is done away with, v

thus overcoming friction and wasted strain on the warp-threads.

Referring to the drawings, Figure 1 is a side View of one form of tension mechanism embodying my invention, showing the warp beam and warp-threads leading therefrom. Fig. 2 is a view similar to Fig. 1, with the tension mechanism in a different position. Figs. 3 and 4 show a modified form of tension mechanism embodying my invention with the parts in different positions.

Referring'to Figs. 1 and 2, which show'a shear arrangement of the roll-supporting arms on one side of the loom-frame, there is a separate rocking arm or support for each end of the rolls 2 and 3, over which the warpthreads g and it pass from the warp-beam l. The arms or supports are of angle shape, and one arm, as 16, for the roll 2 is pivoted at 18 pivotal support, and the other arm, as 17, for the roll 3 is pivoted at 19 to have a rocking or swinging motion on its pivotal support. The arm 17 has a stud or pin 20 adjustable in an elongated slot 21 therein and extending out from one side thereof and into an elongated slot 21 in the end of the other arm 16, as shown.

It will be seen that the tension on the set of warp-threads g by the raising or lowering of the harnesses above or below the plane of l on the warp-threads 71, moving the roll 2 and to have a rocking or swinging motion on 1ts-- r its supporting-arm 16 in the direction of arrow 0, and the arm 17 and its roll 3 being simultaneously moved in the direction of arrow (1 to put a tension on the warpthreads g.

Referring to Figs. and 4, which show another shear arrangement of the roll-supporting arms, there is a separate arm or support for each end of the rolls 2 and 3, over which the warp-threads t andj pass from the warp-beam 1. The two arms 22 and 23 are pivot-allyconnected at 24, with their free ends provided with open-end slots 22 and 23 to receive the journals or ends 2 and 3 of the rolls 2 and 3. The opposite ends of the arms 22 and 23 are pivotally connected with the arms 25 and 26, as shown, and the other ends of the arms 25 and 26 are pivotally attached to a roll 27, which travels on a flange 28 on a stand 28. A spring 29, attached to a hook 30 on the roll 27 and to a stationary point, (not shown,) acts to draw down the roll 27 and move the rolls 2 and 3 toward each other, as shown in Fig.

It will beseen that the tension on the set of warp-threads 11 by the raising or lowering of the harnesses above or below the plane of the fabric will draw the roll 3 in the direction of the arrow e, Fig. 3, and at the same time, through the shear-joint connections, movethe roll 2 in the direction of arrow f to put a tension on the warp-threads j, eX- tendingin the plane of the fabric being woven.

In Fig. at is shown the opposite position of the rolls shown in Fig. 3. The tension of the warp-threads j moves the roll 2 in the direction of arrow 9, and the roll 3 is simultaneously moved in the direction of arrow It to put a tension on the warp-threads 2'.

The advantages of my improved warp tension mechanism will be readily appreciated by those skilled in the art. It is of verysimple construction and maybe used inconnection with anyordinary construction of loom.

The raising and lowering of the harnesses to form two sheds for the shuttles to pass through preparatory to the beating up of the lay as usual will cause the two rolls of the tension mechanism to have a simultaneous motion on their supporting arms or bearings to regulate and equalize the tension of the warp-threads, so that there will be no slack in the warp-threads as the lay beats up.

The rolls act to counterbalance each other, so that the taking up of the slack is accomplished with very little strain, as above stated. It will be understood that the details of construction of my warp tension mechanism may be Varied, if desired, from what is shown in the drawings.

It will be understood, of course, that the loosely-pivoted arms, as shown in the drawings, are duplicated on each side of the loomframe and that the rolls 2 and 3 extend from the arms on one side of the loom-frame to the corresponding arms on the opposite side of the frame, the arms on the same side of the loom-frame having a yielding connection be tween them.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-

1. In a loom, the combination of a warpbeam, shedding mechanism for simultaneously forming two sheds in the warp-threads led from said beam, said sheds having the adjacent sides approximately in a common plane, a tension device for transmitting the strain of the warp-threads in the outer plane ofthe shed to the threads in the common plane to secure uniform tension on all the threads, said tension device comprising a plurality of loosely-pivoted arms at each side of the loomframe, rolls joining said arms on opposite sides of the loom-frame and a yielding connection between the adjacent arms on the same side of theloom-frame, the warp-threads coming from the beam being divided into two sets each of which passes over and engages one of said rolls.

2. In a loom, the combination of a warpbeam, shedding mechanism for simultaneously forming two sheds in the warp-threads led from said beam, said sheds having two adjacent sides approximately in a common plane, a tension device for transmit-ting the strain of the warp-threads in the outer plane of the shed to the threads in the common plane to secure uniform tension on all the threads, said tension device comprising a plurality of separate arms at each side of the loom-frame, rolls joining the arms on opposite sides of the loom-frame, said separate arms on the same side of the loom-frame being connected to sim ultaneously move the rolls toward and away from each other, the Warp-threads being divided into sets each of which engages one of said rolls to regulate the tension on the warpthreads.

V. E. MORSE. \Vitnesses:

J. O. DEWEY, M. HAAS. 

